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Microchip Technology AT49BV3218-11TI
- Part No.:
- AT49BV3218-11TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV3218-11TI.pdf
- Description:
- IC FLASH 32MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT49BV3218-11TI from Microchip Technology (formerly Atmel) is a 32-Mbit (2M × 16 / 4M × 8) single-supply Flash memory IC supporting 2.65–3.3 V operation, 85 ns access time, sector erase architecture with 71 independently lockable sectors, and dual-plane concurrent read/program-erase capability. It is used in embedded boot code storage, firmware update modules, and industrial controller nonvolatile memory subsystems.
For engineers reviewing the AT49BV3218-11TI datasheet, AT49BV3218-11TI pinout, AT49BV3218-11TI application, or AT49BV3218-11TI equivalent, key selection considerations include voltage range compatibility (2.65–3.3 V), TSOP-48 package footprint, sector lockdown security, erase suspend functionality, and dual-plane timing behavior for real-time firmware patching.
Technical Context
The AT49BV3218-11TI implements a dual-plane Flash architecture: Plane A contains eight 4K-word and fifteen 32K-word sectors; Plane B contains forty-eight 32K-word sectors. This enables concurrent read from one plane while programming or erasing the other - eliminating read latency during background updates.
It supports hardware-based sector lockdown via six-cycle command sequences, 128-bit factory/user protection register with block-B programmability control, and three end-of-operation detection methods: RDY/BUSY pin (open-drain), Data Polling (I/O7 complement), and Toggle Bit (I/O6 toggling). Erase suspend/resume operates within the same memory plane only.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit (2,097,152 × 16-bit or 4,194,304 × 8-bit) |
| Supply Voltage | 2.65 V to 3.3 V - compatible with 3.3 V logic systems without level shifters |
| Access Time | 110 ns max - meets timing requirements for 8–10 MHz microcontroller bus interfaces |
| Program Time | 15 µs per word - enables fast field firmware patching in production test environments |
| Erase Time | 200 ms per sector - predictable duration for host software timeout handling |
| Standby Current | 10 µA - suitable for battery-backed or low-power sleep modes in portable equipment |
| Operating Temp | -40°C to +85°C - qualified for industrial temperature range applications |
Pinout & Package
AT49BV3218-11TI is available in a 48-pin Thin Small Outline Package (TSOP Type I), 12 mm × 20 mm body, 0.5 mm pitch. Pin 1 is marked by a beveled corner; pin numbering proceeds counterclockwise.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| A0–A20 | Address Inputs | 21-bit address bus supporting full 32-Mbit addressing; A-1 function on I/O15 in byte mode |
| CE | Chip Enable | Active-low chip select - enables device on shared data bus; must be low for read/write |
| OE | Output Enable | Active-low output control - gates data outputs to prevent bus contention during reads |
| WE | Write Enable | Active-low write strobe - latches address/data during command sequences and programming |
| RESET | Reset Input | Hardware reset - forces device into read/standby mode and halts ongoing operations |
| RDY/BUSY | Status Output | Open-drain active-low signal - indicates internal program/erase activity; supports wired-OR multi-device monitoring |
| I/O0–I/O15 | Data I/O | 16-bit bidirectional data bus in word mode; I/O0–I/O7 active in byte mode with I/O15 repurposed as A-1 |
| BYTE | Mode Select | Logic-high = word mode (x16); logic-low = byte mode (x8) - configures data bus width at power-up |
| VPP | Optional Program Supply | Pin 13 or 14 may connect to 12 V for high-voltage programming; unconnected in standard 3.3 V operation |
| NC | No Connect | Pin 14 (TSOP) is NC when VPP is assigned to pin 13 - no PCB routing required |
Key Features
| Feature | Design Value |
|---|---|
| Dual-plane architecture | Enables simultaneous read from one plane while programming/erasing the other - critical for zero-downtime firmware updates |
| Erase suspend/resume | Pauses active sector erase to allow immediate read/program of other sectors in same plane - improves system responsiveness |
| Sector lockdown | Per-sector write-protection activated via command sequence - secures boot code against accidental overwrite |
| 128-bit protection register | Factory-programmed 64-bit block A + user-programmable/lockable block B - supports secure device identification and anti-cloning |
| Three status detection methods | RDY/BUSY pin, Data Polling (I/O7), and Toggle Bit (I/O6) - provides redundant, software- or hardware-driven operation completion signaling |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code Retention |
|---|---|
Use Scenario: Storing bootloader and safety-critical firmware in programmable logic controllers requiring field-upgradable but tamper-resistant memory. IC Role / Device Role / Timing Role: Nonvolatile boot memory mapped to microcontroller address space; accessed during cold start and firmware recovery sequences. Use Value: Sector lockdown prevents unauthorized modification of boot sector; dual-plane operation allows background firmware validation while system remains operational. | Use Scenario: Holding certified diagnostic firmware and calibration tables in FDA-regulated imaging equipment where data integrity and revision control are mandatory. IC Role / Device Role / Timing Role: Primary x16 Flash memory for ARM Cortex-M7-based host processor; configured in word mode with CE/OE-controlled timing. Use Value: 128-bit protection register enables unique device serialization; 10 µA standby current extends battery backup runtime during power loss events. |
| Telecom Base Station Configuration | Automotive Infotainment Update Module |
Use Scenario: Storing radio configuration profiles and protocol stacks in LTE small-cell base stations deployed in outdoor enclosures. IC Role / Device Role / Timing Role: Standalone Flash memory interfaced to FPGA configuration manager; erased/reprogrammed via JTAG-accessible command sequences. Use Value: -40°C to +85°C rating ensures reliability in uncontrolled ambient environments; 200 ms sector erase enables rapid profile switching without service interruption. | Use Scenario: Hosting over-the-air (OTA) firmware images in automotive head units, where secure, incremental updates must coexist with active media playback. IC Role / Device Role / Timing Role: Secondary Flash memory bank managed by dedicated MCU; accessed via parallel bus with RDY/BUSY handshaking. Use Value: Erase suspend allows playback continuity during OTA image verification; top/bottom boot block configuration supports fail-safe dual-bank update schemes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF3201C-70-4C-EKE | 3.0–3.6 V supply; 70 ns access; 48-pin TSOP; no dual-plane or erase suspend | Lacks concurrent read/erase; requires full wait-state handling during updates | Choose when cost sensitivity outweighs real-time update requirements and security features are not needed. |
| MX29LV320ETTI-70G | 3.0–3.6 V supply; 70 ns access; 48-pin TSOP; top/bottom boot blocks only - no sector lockdown or protection register | Supports basic boot code storage but offers no hardware-level sector write protection or device ID security | Select for legacy designs migrating from older AMD/Spansion parts where command set compatibility is prioritized over advanced features. |
Compared with SST39VF3201C-70-4C-EKE and MX29LV320ETTI-70G, the AT49BV3218-11TI delivers unique dual-plane concurrency, hardware-enforced sector lockdown, and 128-bit protection - making it the only option among the three suitable for safety-critical, field-upgradable embedded systems requiring both performance and security.
Availability
AT49BV3218-11TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code retention, and telecom base station configuration requiring stable component supply across extended product lifecycles.
Supply support for AT49BV3218-11TI includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology acquired Atmel in 2016 and maintains full support for legacy Atmel Flash products including the AT49BV/LV3218 series.
The AT49BV3218-11TI belongs to Atmel's parallel-interface Flash memory product line, designed specifically for embedded systems requiring robust, in-system programmable nonvolatile storage with hardware security and real-time update capabilities.
FAQ
What voltage range does the AT49BV3218-11TI support, and is it compatible with 3.3 V logic systems?
The AT49BV3218-11TI operates from 2.65 V to 3.3 V, making it fully compatible with standard 3.3 V logic families without level translation. Its input thresholds (VIL ≤ 0.6 V, VIH ≥ 2.0 V) and output drive levels (VOH ≥ 2.4 V at -400 µA) ensure reliable interfacing with 3.3 V microcontrollers and FPGAs. The AT49BV3218-11TI also tolerates 0–5.5 V on address/control inputs, simplifying mixed-voltage board design.
Does the AT49BV3218-11TI support true concurrent read and write operations?
Yes - the AT49BV3218-11TI implements a dual-plane architecture that permits reading from one memory plane (e.g., Plane B) while programming or erasing the other (e.g., Plane A), with no timing penalty. This is distinct from simple background erase; it delivers true hardware-level concurrency. The AT49BV3218-11TI achieves this without external arbitration logic, enabling deterministic real-time firmware updates in safety-critical systems.
How does sector lockdown work on the AT49BV3218-11TI, and can locked sectors be unlocked?
Sector lockdown on the AT49BV3218-11TI is enabled per sector using a six-cycle command sequence. Once activated, the sector becomes read-only - immune to program or erase commands until the next power cycle or RESET assertion. Lockdown is irreversible during active power; unlocking requires hardware reset or power-down. The AT49BV3218-11TI uses this to protect boot code while allowing field updates to application sectors.
What are the supported methods to detect completion of a program or erase operation on the AT49BV3218-11TI?
The AT49BV3218-11TI provides three independent, hardware-verified methods: (1) RDY/BUSY pin (open-drain active-low), (2) Data Polling (I/O7 returns complement of written data until completion), and (3) Toggle Bit (I/O6 toggles during operation, stops when complete). All three are usable simultaneously. The AT49BV3218-11TI datasheet specifies timing windows and electrical conditions for each method to ensure deterministic polling in interrupt-driven or polled firmware.
Is the AT49BV3218-11TI pin-compatible with other members of the AT49BV/LV3218 family, such as the AT49BV3218-90TI or AT49BV3218-85TI?
Yes - all speed grades of the AT49BV3218 (including -85TI, -90TI, and -11TI) share identical pinout, package (TSOP-48), command set, and electrical interface. The suffix denotes access time: -85TI = 85 ns, -90TI = 90 ns, -11TI = 110 ns. The AT49BV3218-11TI is backward-compatible in layout and firmware; slower timing margins simplify timing closure in noise-prone or long-trace PCB designs.
AT49BV3218-11TI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 48-TFSOP (0.724", 18.40mm Width)
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 32Mbit
- Memory Organization:
- 4M x 8, 2M x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 20µs
- Access Time:
- 110 ns
- Voltage - Supply:
- 2.65V ~ 3.3V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSOP
AT49BV3218-11TI FAQ
1.How can I place an order for AT49BV3218-11TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV3218-11TI on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AT49BV3218-11TI reliable?
The price and inventory of AT49BV3218-11TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV3218-11TI is usually 5 days.
3.What payment methods are accepted for AT49BV3218-11TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV3218-11TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV3218-11TI?
AT49BV3218-11TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV3218-11TI order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AT49BV3218-11TI?
For technical support, including AT49BV3218-11TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV3218-11TI requirements.
6.How does Aetrix verify that AT49BV3218-11TI is sourced from the original manufacturer or authorized distributors?
All AT49BV3218-11TI products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AT49BV3218-11TI meets industry standards.
7.What is the process for return or replacement of AT49BV3218-11TI?
All AT49BV3218-11TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV3218-11TI, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AT49BV3218-11TI part is unused and in its original packaging.
Return procedure for AT49BV3218-11TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV3218-11TI Tags
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AT24C02C-XHM-T
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